steward



P. M. STEWART.

COMPOSITE SLAB POP BUILDING PURPOSES.

APPLICATION FILED MAY l5. 1911.

Patented July 1, 1919.

the borough of. Manhatten,

in; simon-niger new nenn, n;

All I new n. ir.'

l lllhli i mmwummumwwm issie-non ro ooinrosrrn stifle ronnntnrnernnrosns inoenee Application filed Mey 1&1, l

'which is especially designed among other uses to be employed es o tileor reeling sieh. rEhe invention hes for its ohjeetto provide eooniposite sieb which is light in Weight, so that it een be easilyhnndled, which is strong so :is to resist 'trentine in handling, endwhich dre, tomes, cliinetio zhenges etea To this end, the composite slabis provided with e.. body portion of gypsum or like snbstantielly light,nonnietellie cementitions substance, which body portionv is providedWith e plnrelity of openings extended through it which ere-filled with ereinforcing non-metallic materiel, snoh es Concrete, Whiohitornfis.rein)forcingbers or sections of non-rnetellie eeinentitiousmaterial enveloped -hy end bonded with the lighter non- V nietelliemateriel., end the oonerete bers are lli provided with e, instelrein'lforoenient ein tended through sind enyeloped by them The compositesieh tile thus pro ducedl may be need to edyentege, but it is preferredto provide the seine with e layer of asbestos or lile librons materielon one orboth. snriieoes, l when used on only one surface" to providethe other surface with e Waterproof adhesive Composition or "lflieinetellic reiniioreing` inenihers oit ndj osent tiles or slabs nitty' betied together end embedded e ber ont plastic non-installi@ materiel,sneh es gypsum or eonorete is preferred, or they may be secured to thesup porting freine el" building.

IThese end other lfezitnres ol this invention 'Will be pointedont in thecleinis at the end of this specification. y

Figure lis n plan ein portion of e roof provided with tiles or slabsembodying this invention.,

Svpeeieation oi' Lettei'sllatent.

` Patented lnly 1, '31h19.

sir. sereine. issues.

llig, '29 e section on'theline 2--2, llig., 1

. lling. 3,@ section on the line 3 2), Fig. 1.

Referring to the drawing, l represents ennrnnnn .in sommier, on

the body portion oi e 'composite slab or tile embodying this invention,said body portion being composed of gypsum or like light, non? installi@ceinentitions materiel, which is pro'- vided with preferably n pluralityof holes oropenings l2 extended, for the best results, through the bodyportion l0 from side to side or troni end to end, and preferablyarranged parallel to one another and in sub stentinlly close proximityto one another.

The/body portion 10 of gypsum or like material, While; light5 is more orless fragile and lisible to be broken, and to overcome this 'l hereprovided the said body portion with e'reinioreenient et concreteceinentitions me teriel which fills the openings 12, bonds with the bodyportion 10, and forms Within the body portion e series o13 reinforcingbers 13 of nommait-elli@ materiel, which bers in tnrn ere reinforced bymetal rods9 Wires, or

the like. 14, which preferably extend beyond the ends oi'thecOn-Cretebars 13 and may end preferably will be provided With` bendsor eyes 15 et their ends for e purpose es Will be described. y

The reinforced sieb nitty and. preferably "will be provided on one faceor surface with a layer 16 of fibrous material, preferably asbes- -tospeper or felt or 'the like, which is preierzibly n:eterpimofed sindwhich serves es e protector :tor the tile egeinst seid end ellreli fumesend nioistnarel end said layer may and,

preferably will be bonded to the body portion 10 el the slab or tile.

The composite slabs or tiles thus formed rosy end preferably will beleid upon the roof oil e building' with adjacent tiles spaced eport and'with thereintoroing rods; isnb stnntinlly in line with ezieh other, sothat they nifty be tied together by Wires 21, and

-When 'tlins tied. the space between adjacent tiles may be filled inwith concrete 20 or other plastic instel-ish Whiehnot only protoets theinetelconnections 21 and the projecting ends of the metal reinforcingrods 1l, but also bonds adjacent tiles together, es represented in Figs1 end 3.-

l'n practicefx the asbestos loyer 1G niey be leid in the ino'ld in Whiehthe hollow body portion 10 is formed, so that-'the plastic gypsum maybebonded to the asbestos-2er other brous layer,v `and the l-liolloy'izbody portion.

adhering thereto, may th'en be removed fromthe mold and the metalreinforcing rods or wires 14 extended through the openings 12 and thelatter fill'ed with concrete or other plastic material of greaterstrength than the body portion 10 toform the bars 13, Instead of -thisparticular method of forming the composite slab, the reinforced concretebars may be first formed, placedin the mold and the gypsum then pouredor otherwise placed in the mold so as to embed the reinforced concretebars in the. gypsum body portion.

' The composite slab is herein described as a tile and While it is Welladapted for such use, it is not desired to limit the invention in thisrespect, as the slab can be made of may andpre'ferably will befgizen acoat 2f)l of -asphalt or other adhesive material, after .the slab hasbeen' 'allowed to dry outi'n the sho C aims l. A composite slab.comprising a body l portion of substantially light relatively fragileplastic material, a section ofv plastic com entitious material ofvgreater strength em? beddedin said body portion and bonded therewith,and a metal reinforcementv embed- 'ded in said section.`

'2. A compositeslab' comprising a -body portion of gypsum, a pluralityof sections of' concrete located in said body portion and bondedtherewith, and a metal reinforcement embedded 1n sald concrete.

In testimony whereof, I havelsigned my namel to this specification.

PEREZ M. STEWART.

